Electric field control of superexchange in multiple linear two-electron quantum dot arrays and mixed-valence molecules
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PALII, Andrew; TSUKERBLAT, Boris. Electric field control of superexchange in multiple linear two-electron quantum dot arrays and mixed-valence molecules. In: Journal of Applied Physics. 2019, nr. 14(125), p. 0. ISSN 0021-8979.
10.1063/1.5052581
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Journal of Applied Physics
Numărul 14(125) / 2019 / ISSN 0021-8979

Electric field control of superexchange in multiple linear two-electron quantum dot arrays and mixed-valence molecules


DOI: 10.1063/1.5052581
Pag. 0-0

Palii Andrew12, Tsukerblat Boris34
 
1 Institute of Applied Physics,
2 Institute of Problems of Chemical Physics, Russian Academy of Sciences,
3 Universitatea Ben-Gurion din Negev,
4 Ariel University
 
Disponibil în IBN: 2 mai 2019


Rezumat

This paper belongs to the area of electrical manipulation of spins in quantum dots and molecular spins for quantum technologies. We propose a theoretical analysis of the electric field controllable superexchange in the two-electron linear arrays of quantum dots ("physical" molecules) and linear mixed-valence molecules based on metal ions in different oxidation degrees ("chemical" molecules) of increasing length. In this view, we consider the kinetic magnetic exchange in trimeric and tetrameric linear arrays of quantum dots and the field dependence of the exchange interaction between electrons. An attainable electric field in these systems is able to essentially change the electronic distribution in the systems under consideration and subsequently to affect the exchange interaction. The numerical estimations demonstrate the feasibility of the revealed effects of the electric field. At a weak electric field, this control is shown to be more efficient for larger numbers of diamagnetic quantum dots mediating superexchange. The peculiarities of chemical analogs of such quantum dot arrays represented by the linear triferrocenium and tetraferrocenium complexes containing two mobile holes are discussed as well.

Cuvinte-cheie
Chemical analysis, Electric fields, Exchange interactions, Metal ions, Metals, Molecules, nanocrystals